Improvement in lamp-shades



T. B. DOOLITTLE.

LAMP SHADE.

Patented Mar. 10, 1868,

@i'niltsh gist-2s gaunt @ffitep T. B. DOOLITTLE, OF BRIDGEPORT, CONNECTICUT, ASSIGNOR TO HIMSELF, .GEORGE DOCLITTLE, AND GEORGE H. DlMOND. I

" Lam Patent-W0. 75.390, dated March 10, 1868.

IMPROVEMENT IN LAMP-SHADES.

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TO ALL WHOM IT MAY CONCERN:

Beit known that I, '.l.. B. DOOLIMLE, of Bridgeport, of Fairfieldcounty, in the State of Connecticut, have invented certain new and useful-improvements in Lamp-Shadesf and I do hereby declare that the following 'is a full and exact description thereof, rcferencebeing-liad to the accompanying drawings, making part of this application.

My invention relates to certain new and useful improvements in that kind of lamp-shades whichis intended and adapted to be placed upon and be'sustained by the chimney of the lamp, and has for its main object to supply the wantof an economic and efie'ctive shade and reflector adapted to be used on the chimney of the common kerosene-lamp. -And my invention consists in making a lamp-shade of a corrugated or crimpedisheot of thin brass or other suitable material, in such manner that it shall be capable of'suflicie'nt expansion to permit of its being forced orsprung down over and so that 'it'will cling to the chimney of the lamp, all as will be presently 'more fully described. And my invention further consists in the employment, in combination with a lamp-shade, of a holder-spring or springs, such as hereinafter more fully described, arranged on the upper edge of the shade, and adapted to'clasp the chimney-of a lamp and retain the shade thereon, all as will be presently more fully explained. Andmy invention further consists in forming a'yielding or expansible metallic shade,

with projecting bearing-points or teals, to rest in contact with the chimney and hold. the upper portion of the shade sufliciently far from the chimney to-prevent the shade getting too hot, all us will be presently fully described. I f

To enable those skilled in the art to make and use my invention, I will proceed to'describe'the constructionand operation of the several features of my said improvements, referring'by letters to the iccompanying drawings, in -whieli Figure 1 is a top view of one of my new metallic lamp-shades, shownfas applied to the chimneyof a suns burnerfkerosene-lamp Figure '2 is a; vertical section of the same.

Figure 3 is a vertical seotion'of another shade, (and ohimney',) showing the third feature of my inveii: tionand l Figure 4 is a partial inside View of shade, illustrating more particularly-the.bearing teals;

In the several figures the same letters of reference denote the same part; I v

A is the lamp-chimney, and B the shade, which I- propose to make of thiirsheet brass inabout the shape seen in the drawings, 'with its top opening sufii'ciently large to permit the accommodation within it of the chimney A, as shown. C is a spiral spring arranged at the top edge of the shade B, being run into holes 1, 2, 3,

" &6 made 'near the edge ofshade B, as clearly seen at figs. 1 and 2. This spring-roll or spiral coil C surrounds and clings to the chimney A, and holds the shade thereon at any desired point or elevation. At figs. 3 and 4 the shade B is made with aserie'sof inwardly-projectingteals, a s a, near its top edge, which bear against the himney A, the'shade B in this case being retained on the-chimney by the springer elasticity 'ofthe shade itselflof which it has a sufficiency, in consequence of being made, as shown and described, of thin sheet brass,

corrugated or crimpedasillustrated. Th s object and advantage of the teals s, (which are, formed by simply striking up projections with a die) are to hold the upper edge of the shade Bfar enough away from the chimmy to permit a free circulation of air up around the outside of the latter, and to avoid the liability of the shade to get too hot, as it would if it rested completely contact with the glass chimney of the lamp at its upper edge. 'The size, proportion, and flare of the shade may of course be varied at pleasure,although it will b found advisable, in constructing it to be used without anyspring, C, to have'the flare or taper suflioientand the corrugations fine enough to insure a proper amount of spring or expansive and contractive capability to l the shade as to insure its spreading around on andolinging to the chimney.

I propose to prepare the under surface of the metallic shade suitably to make it perform the office of o. good reflector, as well as shade, and it will be seen theta shade constructed according to my invention may be very readily adjusted (verticelly) on the ordinary straight (or nearlystraight) chimney, and that it will exceeding light and convenient for use, while at the some time it will be extremely simple, durable, and economic ,of mzinnfucture. I

-, It will hennalorstood that on effective and most-desirable shade and'rofle'ctor may be menufacturedby simply forming the shade of thin sheet brass so corrugated or crimpedns to have suflicien't elesticityor spring to-it to clasp snd retnin itself on the chimneyw it'hout using the other two featnres of my improvements, the spiral spring and benring-tenls, but it may be found more advantageous to use the teals 8. When nospring, G, is

employed, andnlthoughasuflicient amount of expensive cnpacity or spring may be induced in the shade itself if formed of the right material, of proper thickness, and suitohly cori'ugated,I propose generoll'y to oinpl'oy'tlio spiral spring 0, or its equivalent, as by the use of it, in connection with. the shade B, as shown, I-am enabled to make the opening in the top 'of shade largerond get more yielding or a greater scope of adjustment, so that the shade call be used on chimneys varying considernblyin their (liometers. And it will be seen that in the use ofthe spring 0 on the shade B, .the former will roll over or spread considerably to permit the insertion of-a chimney quite as large as the opening in the top of shade, and that if the shade b e forcecl down over a. chimney even larger than the'sni'd opening, the spring will yield first to its full extent, and then the shade itself will "yield, nndlhy its own elasticity cling to the chimney.

4 y will be understood that in lieu of the continuous spiral spring running entirely around the top edge oi" Zshede, disconnected separate pieces of spiral spring may be plaoedzit intervals around the edge-of shade, and so adapted as to roll or yield in the mannerdescrihednnd shown of spring 0 but I; deem the continuous spring -g ood,, g.nd. it is readily attached end secured so it to roll over when spread bythe insertion of the chimneyias I illustrated by the positions shorrn' red and' black lines at fig. 2.)

' It may be rem'arked that the piral clasp or spring shade-holder C may be applied with great advantage to other shades thou the kind mod .uecordance with the other features of my invention; end it will be readily '2 men thatthis feature of myjuvention- (the coil-spring clasp) conbeopplied to thextop edge of any paper or other shade suitably madmnnd'thiis be used advantageously Without using the othertfen tures of my invention. ,,,.1 therefore-wish to he understood os' not :limiting my claim of invention, in respect to the spring-clasp, to its use in'conneetion only with the other features'of my invention, though I have practised it so .for in that connection; but having fully described the-construction and operationof my invention,

What I claim a; new, anddesire to secure by Letters Patent, is-

1. A lamp-shade or reflector, formed of sheet inetal ednpted to .be applied. to the chimney of a, lamp, and so corrugated or crimped as to be capable of sufiicient spring or elasticity to permit it to be sprung on to the chimney, substantially as described. I

2. I cloiu i the employment, in combinntion with a shade or reflector, of a spiral or coil spring or springs nr'ranged in the upper-edge of the shade so as tmroll over a spring-hack, substantially as described fortho purpose set forth V i 3. I claim forming a corrugated or crimped metallic shade, with projecting'teols or lips a a, substantially oadescribed fioithe purpose set forth. In testimony whereof, I have hereunto setmy hand and seal, this twontyloutth day of January, 1868.

'r.- n. DOQLITTLE. {12. 5.

Witnesses:

Wu. H. Leno, Geo. W. WARNER. 

